A054163 Number of positive integers <= 2^n of form 3 x^2 + 6 y^2.

0, 0, 1, 2, 4, 7, 13, 23, 43, 78, 144, 269, 502, 945, 1794, 3414, 6537, 12559, 24195, 46751, 90539, 175693, 341530, 664965, 1296520, 2531118, 4946995, 9678777, 18954593, 37152384, 72879304, 143067454, 281043183, 552433040, 1086529470

Offset

0,4

Links

Table of n, a(n) for n=0..34.

Index entries for sequences related to populations of quadratic forms

Crossrefs

Sequence in context: A048888 A280027 A026724 * A036256 A093629 A174566

Adjacent sequences: A054160 A054161 A054162 * A054164 A054165 A054166

Keyword

nonn

Author

David W. Wilson

Status

approved